HEIDENHAIN TNC 410 M Technical Manual page 156

Data
Acceleration moment
M
acc
Maximum moment of
the motor M
Mmax
Maximum moment of
the inverter M
Umax
Comparison of the
acceleration moment
with the maximum
moment of the motor
and inverter
Weighting factors
K , K , K
B Pos acc
April 2007
Formulas
⋅ ⋅ π
J 2
tot
M acc = -------------------------------------------- -
⋅ η t ⋅ acc
60
M from data sheet
Mmax
Or
⋅
M = 3 M
Mmax 0
M
Mmax ⋅
-----------------
=
M I
Umax
I
Mmax Umax
Or
M
MN
⋅ ⋅
----------- -
M = 0.8
Umax
I
MN
>
M M
Mmax
acc
>
M M
Umax
acc
t
B
K = --------
B
t
tot
t
Pos
K = -------- -
Pos
t
tot
t
acc
=
K ----------
acc
t
tot
Note:
+ +
K K K
B Pos acc
Selection of the Axis Motor
Variable
J : Total moment of inertia [kgm
tot
n : Desired speed of the motor [min
M
⋅
n
η : Efficiency of the motor [-]
M
t : Desired acceleration time [s]
acc
M : Stall torque of the motor [Nm]
0
M
Mmax
motors [Nm]
I : Maximum current of the motor [A]
Mmax
I : Maximum current of the inverter
Umax
[A]
M : Rated torque of the motor [Nm]
MN
I : Rated current of the motor [A]
MN
I
Umax
M
Mmax
motors [Nm]
M : Acceleration moment [Nm]
acc
M
Umax
inverter [Nm]
t : Machining time
B
t : Total running time
tot
t : Time for positioning operations
Pos
t : Time for acceleration
acc
All times must be given in the same
unit of measure!
=
1
: Maximum moment of the
: Maximum moment of the
: Maximum moment of the
2
]
–1
]
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